When trying to save structures, even when Include Entities is ON, entities aren't saving.
Either it is saving and is unable to load (also with Include Entities ON), or it doesn't save in the first place.
This was tested with armor stands, area effect clouds, pigs, etc...
Minecraft Java Edition; 20w12a - Singleplayer
Confirmed. The structure loader still removes UUIDLeast and UUIDMost instead of UUID, causing the UUID of the old mob to be used and the mob skipped. This is probably the cause of MC-175239 as well.
UUIDLeast
UUIDMost
UUID
Reporter: migrated
Assignee: boq
Created: 2020-03-24T00:14:55Z
Updated: 2026-09-07T14:54:17Z
Resolved: 2020-03-24T09:09:26Z
Confirmation Status: Confirmed
Mojang Priority: Very Important
Category: Structures
Labels: entity, structure, structure_block
Affects Versions: 20w12a
Fix Versions: 20w13a
Retrieved 2026-09-07T14:54:27Z
Confirmed. The structure loader still removes
UUIDLeastandUUIDMostinstead ofUUID, causing the UUID of the old mob to be used and the mob skipped. This is probably the cause of MC-175239 as well.